<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片试图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-alert show-icon center title="添加商品信息" type="info" :closable="false">
          </el-alert>
        </el-col>
      </el-row>

      <!-- 步骤条 -->
      <el-steps :active="activeIndex - 0" finish-status="success" class='step' align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 标签页 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs tab-position="left" style="margin-top: 30px;" v-model='activeIndex' :before-leave="beforeTabLeave"
          @tab-click='tabClicked'>
          <el-tab-pane label="基本信息" name='0'>
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price" type='number'>
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight" type='number'>
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number" type='number'>
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop=' goods_cat'>
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name='1'>
            <el-form-item v-for='item in manyTableDate ' :key='item.attr_id' :label="item.attr_name">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="i" v-for='(i,index) in item.attr_vals' :key='index' border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品属性" name='2'>
            <el-form-item :label="item.attr_name" v-for='item in onlyTableData' :key='item.attr_id'>
              <el-input v-model='item.attr_vals'></el-input>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品图片" name='3'>
            <el-upload action="https://www.liulongbin.top:8888/api/private/v1/upload" :on-preview="handlePreview"
              :on-remove="handleRemove" list-type="picture" drag multiple :headers="headerObj"
              on-success="handleSuccess">
              <i class="el-icon-upload"></i>
              <div class="el-upload__text">将图片拖到此处，或<em>点击上传</em></div>
            </el-upload>
          </el-tab-pane>

          <el-tab-pane label="商品内容" name='4'>
            <quill-editor v-model='addForm.goods_introduce'> </quill-editor>
            <el-button type='primary' style="margin-top: 15px;" @click='add'>添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="">
    </el-dialog>
  </div>
</template>

<script scoped>
  import _ from 'lodash'
  export default {
    created() {
      this.getCateList()
    },
    data() {
      return {
        headerObj: {
          Authorization: window.sessionStorage.getItem('token')
        },
        onlyTableData: [],
        manyTableDate: [],
        previewVisible: false,
        previewPath: '',
        cateProps: {
          expandTrigger: 'hover',
          label: 'cat_name',
          value: 'cat_id',
          children: 'children',
          goods_cat: []
        },
        cateList: [],
        activeIndex: '0',
        addForm: {
          attrs: [],
          goods_name: '',
          goods_price: 0,
          goods_number: 0,
          goods_weight: 0,
          goods_cat: [],
          pics: [],
          goods_introduce: ''
        },
        addFormRules: {
          goods_name: [{
            required: true,
            message: '请输入商品名称',
            trigger: 'blur'
          }],
          goods_price: [{
            required: true,
            message: '请输入商品价格',
            trigger: 'blur'
          }],
          goods_number: [{
            required: true,
            message: '请输入商品数量',
            trigger: 'blur'
          }],
          goods_weight: [{
            required: true,
            message: '请输入商品重量',
            trigger: 'blur'
          }],
          goods_cat: [{
            required: true,
            message: '请输入商品分类',
            trigger: 'blur'
          }]
        }
      }
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      }
    },
    methods: {
      add() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return this.$message.error('请填写必要的表单项目')
          //   lodash
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          //   处理动态参数和静态属性
          this.manyTableDate.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })

          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          const {
            data: res
          } = await this.$axios({
            method: 'POST',
            url: 'goods',
            data: form
          })
          if (res.meta.status !== 201) return this.$message.error('提交信息失败')
          this.$message.success('提交信息成功')
          this.$router.push('/goods')
        })
      },
      handleSuccess(response) {
        const picInfo = {
          pic: response.data.tmp_path
        }
        this.addForm.pics.push(picInfo)
      },
      // 处理图片
      handlePreview(file) {
        this.previewPath = file.response.data.url
        this.previewVisible = true
      },
      //   池里删除图片
      handleRemove(file) {
        const filePath = file.data.tmp_path
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        this.addForm.pics.splice(i, 1)
      },
      async tabClicked() {
        if (this.activeIndex === '1') {
          const {
            data: res
          } = await this.$axios({
            url: `categories/${this.cateId}/attributes`,
            params: {
              sel: 'many'
            }
          })
          if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败!')
          res.data.forEach(i => {
            i.attr_vals = i.attr_vals.length === 0 ? [] : i.attr_vals.split(' ')
          })
          this.manyTableDate = res.data
        } else if (this.activeIndex === '2') {
          const {
            data: res
          } = await this.$axios({
            url: `categories/${this.cateId}/attributes`,
            params: {
              sel: 'only'
            }
          })
          if (res.meta.status !== 200) return this.$message.error('获取静态属性列表失败!')
          this.onlyTableData = res.data
        } else if (this.activeIndex === '3') {}
      },
      beforeTabLeave(activeName, oldActiveName) {
        if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error('请先选择分类')
          return false
        }
      },
      // 级联选择器选中项
      handleChange() {
        if (this.addForm.goods_cat.length !== 3) {
          this.addForm.goods_cat = []
        }
      },
      // 获取所有商品分类数据
      async getCateList() {
        const {
          data: res
        } = await this.$axios({
          url: 'categories'
        })
        if (res.meta.status !== 200) return this.$message.error('获取分类列表失败!')
        this.cateList = res.data
      }
    }
  }

</script>

<style scoped>
  .step {
    margin-top: 20px;
    padding: 0 50px;
  }

  el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .ql-editor {
    min-height: 300px;
  }

</style>
